1 /* 2 * Copyright © 1997-2003 by The XFree86 Project, Inc. 3 * Copyright © 2007 Dave Airlie 4 * Copyright © 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * Copyright 2005-2006 Luc Verhaegen 7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * Except as contained in this notice, the name of the copyright holder(s) 28 * and author(s) shall not be used in advertising or otherwise to promote 29 * the sale, use or other dealings in this Software without prior written 30 * authorization from the copyright holder(s) and author(s). 31 */ 32 33 #include <linux/list.h> 34 #include <linux/list_sort.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <video/of_videomode.h> 39 #include <video/videomode.h> 40 #include <drm/drm_modes.h> 41 42 #include "drm_crtc_internal.h" 43 44 /** 45 * drm_mode_debug_printmodeline - print a mode to dmesg 46 * @mode: mode to print 47 * 48 * Describe @mode using DRM_DEBUG. 49 */ 50 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 51 { 52 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " 53 "0x%x 0x%x\n", 54 mode->base.id, mode->name, mode->vrefresh, mode->clock, 55 mode->hdisplay, mode->hsync_start, 56 mode->hsync_end, mode->htotal, 57 mode->vdisplay, mode->vsync_start, 58 mode->vsync_end, mode->vtotal, mode->type, mode->flags); 59 } 60 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 61 62 /** 63 * drm_mode_create - create a new display mode 64 * @dev: DRM device 65 * 66 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 67 * and return it. 68 * 69 * Returns: 70 * Pointer to new mode on success, NULL on error. 71 */ 72 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 73 { 74 struct drm_display_mode *nmode; 75 76 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 77 if (!nmode) 78 return NULL; 79 80 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { 81 kfree(nmode); 82 return NULL; 83 } 84 85 return nmode; 86 } 87 EXPORT_SYMBOL(drm_mode_create); 88 89 /** 90 * drm_mode_destroy - remove a mode 91 * @dev: DRM device 92 * @mode: mode to remove 93 * 94 * Release @mode's unique ID, then free it @mode structure itself using kfree. 95 */ 96 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 97 { 98 if (!mode) 99 return; 100 101 drm_mode_object_unregister(dev, &mode->base); 102 103 kfree(mode); 104 } 105 EXPORT_SYMBOL(drm_mode_destroy); 106 107 /** 108 * drm_mode_probed_add - add a mode to a connector's probed_mode list 109 * @connector: connector the new mode 110 * @mode: mode data 111 * 112 * Add @mode to @connector's probed_mode list for later use. This list should 113 * then in a second step get filtered and all the modes actually supported by 114 * the hardware moved to the @connector's modes list. 115 */ 116 void drm_mode_probed_add(struct drm_connector *connector, 117 struct drm_display_mode *mode) 118 { 119 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 120 121 list_add_tail(&mode->head, &connector->probed_modes); 122 } 123 EXPORT_SYMBOL(drm_mode_probed_add); 124 125 /** 126 * drm_cvt_mode -create a modeline based on the CVT algorithm 127 * @dev: drm device 128 * @hdisplay: hdisplay size 129 * @vdisplay: vdisplay size 130 * @vrefresh: vrefresh rate 131 * @reduced: whether to use reduced blanking 132 * @interlaced: whether to compute an interlaced mode 133 * @margins: whether to add margins (borders) 134 * 135 * This function is called to generate the modeline based on CVT algorithm 136 * according to the hdisplay, vdisplay, vrefresh. 137 * It is based from the VESA(TM) Coordinated Video Timing Generator by 138 * Graham Loveridge April 9, 2003 available at 139 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 140 * 141 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 142 * What I have done is to translate it by using integer calculation. 143 * 144 * Returns: 145 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 146 * The display mode object is allocated with drm_mode_create(). Returns NULL 147 * when no mode could be allocated. 148 */ 149 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 150 int vdisplay, int vrefresh, 151 bool reduced, bool interlaced, bool margins) 152 { 153 #define HV_FACTOR 1000 154 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 155 #define CVT_MARGIN_PERCENTAGE 18 156 /* 2) character cell horizontal granularity (pixels) - default 8 */ 157 #define CVT_H_GRANULARITY 8 158 /* 3) Minimum vertical porch (lines) - default 3 */ 159 #define CVT_MIN_V_PORCH 3 160 /* 4) Minimum number of vertical back porch lines - default 6 */ 161 #define CVT_MIN_V_BPORCH 6 162 /* Pixel Clock step (kHz) */ 163 #define CVT_CLOCK_STEP 250 164 struct drm_display_mode *drm_mode; 165 unsigned int vfieldrate, hperiod; 166 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 167 int interlace; 168 169 /* allocate the drm_display_mode structure. If failure, we will 170 * return directly 171 */ 172 drm_mode = drm_mode_create(dev); 173 if (!drm_mode) 174 return NULL; 175 176 /* the CVT default refresh rate is 60Hz */ 177 if (!vrefresh) 178 vrefresh = 60; 179 180 /* the required field fresh rate */ 181 if (interlaced) 182 vfieldrate = vrefresh * 2; 183 else 184 vfieldrate = vrefresh; 185 186 /* horizontal pixels */ 187 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 188 189 /* determine the left&right borders */ 190 hmargin = 0; 191 if (margins) { 192 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 193 hmargin -= hmargin % CVT_H_GRANULARITY; 194 } 195 /* find the total active pixels */ 196 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 197 198 /* find the number of lines per field */ 199 if (interlaced) 200 vdisplay_rnd = vdisplay / 2; 201 else 202 vdisplay_rnd = vdisplay; 203 204 /* find the top & bottom borders */ 205 vmargin = 0; 206 if (margins) 207 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 208 209 drm_mode->vdisplay = vdisplay + 2 * vmargin; 210 211 /* Interlaced */ 212 if (interlaced) 213 interlace = 1; 214 else 215 interlace = 0; 216 217 /* Determine VSync Width from aspect ratio */ 218 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 219 vsync = 4; 220 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 221 vsync = 5; 222 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 223 vsync = 6; 224 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 225 vsync = 7; 226 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 227 vsync = 7; 228 else /* custom */ 229 vsync = 10; 230 231 if (!reduced) { 232 /* simplify the GTF calculation */ 233 /* 4) Minimum time of vertical sync + back porch interval (µs) 234 * default 550.0 235 */ 236 int tmp1, tmp2; 237 #define CVT_MIN_VSYNC_BP 550 238 /* 3) Nominal HSync width (% of line period) - default 8 */ 239 #define CVT_HSYNC_PERCENTAGE 8 240 unsigned int hblank_percentage; 241 int vsyncandback_porch, vback_porch, hblank; 242 243 /* estimated the horizontal period */ 244 tmp1 = HV_FACTOR * 1000000 - 245 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 246 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 247 interlace; 248 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 249 250 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 251 /* 9. Find number of lines in sync + backporch */ 252 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 253 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 254 else 255 vsyncandback_porch = tmp1; 256 /* 10. Find number of lines in back porch */ 257 vback_porch = vsyncandback_porch - vsync; 258 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 259 vsyncandback_porch + CVT_MIN_V_PORCH; 260 /* 5) Definition of Horizontal blanking time limitation */ 261 /* Gradient (%/kHz) - default 600 */ 262 #define CVT_M_FACTOR 600 263 /* Offset (%) - default 40 */ 264 #define CVT_C_FACTOR 40 265 /* Blanking time scaling factor - default 128 */ 266 #define CVT_K_FACTOR 128 267 /* Scaling factor weighting - default 20 */ 268 #define CVT_J_FACTOR 20 269 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 270 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 271 CVT_J_FACTOR) 272 /* 12. Find ideal blanking duty cycle from formula */ 273 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 274 hperiod / 1000; 275 /* 13. Blanking time */ 276 if (hblank_percentage < 20 * HV_FACTOR) 277 hblank_percentage = 20 * HV_FACTOR; 278 hblank = drm_mode->hdisplay * hblank_percentage / 279 (100 * HV_FACTOR - hblank_percentage); 280 hblank -= hblank % (2 * CVT_H_GRANULARITY); 281 /* 14. find the total pixels per line */ 282 drm_mode->htotal = drm_mode->hdisplay + hblank; 283 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 284 drm_mode->hsync_start = drm_mode->hsync_end - 285 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 286 drm_mode->hsync_start += CVT_H_GRANULARITY - 287 drm_mode->hsync_start % CVT_H_GRANULARITY; 288 /* fill the Vsync values */ 289 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 290 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 291 } else { 292 /* Reduced blanking */ 293 /* Minimum vertical blanking interval time (µs)- default 460 */ 294 #define CVT_RB_MIN_VBLANK 460 295 /* Fixed number of clocks for horizontal sync */ 296 #define CVT_RB_H_SYNC 32 297 /* Fixed number of clocks for horizontal blanking */ 298 #define CVT_RB_H_BLANK 160 299 /* Fixed number of lines for vertical front porch - default 3*/ 300 #define CVT_RB_VFPORCH 3 301 int vbilines; 302 int tmp1, tmp2; 303 /* 8. Estimate Horizontal period. */ 304 tmp1 = HV_FACTOR * 1000000 - 305 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 306 tmp2 = vdisplay_rnd + 2 * vmargin; 307 hperiod = tmp1 / (tmp2 * vfieldrate); 308 /* 9. Find number of lines in vertical blanking */ 309 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 310 /* 10. Check if vertical blanking is sufficient */ 311 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 312 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 313 /* 11. Find total number of lines in vertical field */ 314 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 315 /* 12. Find total number of pixels in a line */ 316 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 317 /* Fill in HSync values */ 318 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 319 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 320 /* Fill in VSync values */ 321 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 322 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 323 } 324 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 325 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; 326 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; 327 /* 18/16. Find actual vertical frame frequency */ 328 /* ignore - just set the mode flag for interlaced */ 329 if (interlaced) { 330 drm_mode->vtotal *= 2; 331 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 332 } 333 /* Fill the mode line name */ 334 drm_mode_set_name(drm_mode); 335 if (reduced) 336 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 337 DRM_MODE_FLAG_NVSYNC); 338 else 339 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 340 DRM_MODE_FLAG_NHSYNC); 341 342 return drm_mode; 343 } 344 EXPORT_SYMBOL(drm_cvt_mode); 345 346 /** 347 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 348 * @dev: drm device 349 * @hdisplay: hdisplay size 350 * @vdisplay: vdisplay size 351 * @vrefresh: vrefresh rate. 352 * @interlaced: whether to compute an interlaced mode 353 * @margins: desired margin (borders) size 354 * @GTF_M: extended GTF formula parameters 355 * @GTF_2C: extended GTF formula parameters 356 * @GTF_K: extended GTF formula parameters 357 * @GTF_2J: extended GTF formula parameters 358 * 359 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 360 * in here multiplied by two. For a C of 40, pass in 80. 361 * 362 * Returns: 363 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 364 * The display mode object is allocated with drm_mode_create(). Returns NULL 365 * when no mode could be allocated. 366 */ 367 struct drm_display_mode * 368 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 369 int vrefresh, bool interlaced, int margins, 370 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 371 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 372 #define GTF_MARGIN_PERCENTAGE 18 373 /* 2) character cell horizontal granularity (pixels) - default 8 */ 374 #define GTF_CELL_GRAN 8 375 /* 3) Minimum vertical porch (lines) - default 3 */ 376 #define GTF_MIN_V_PORCH 1 377 /* width of vsync in lines */ 378 #define V_SYNC_RQD 3 379 /* width of hsync as % of total line */ 380 #define H_SYNC_PERCENT 8 381 /* min time of vsync + back porch (microsec) */ 382 #define MIN_VSYNC_PLUS_BP 550 383 /* C' and M' are part of the Blanking Duty Cycle computation */ 384 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 385 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 386 struct drm_display_mode *drm_mode; 387 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 388 int top_margin, bottom_margin; 389 int interlace; 390 unsigned int hfreq_est; 391 int vsync_plus_bp, vback_porch; 392 unsigned int vtotal_lines, vfieldrate_est, hperiod; 393 unsigned int vfield_rate, vframe_rate; 394 int left_margin, right_margin; 395 unsigned int total_active_pixels, ideal_duty_cycle; 396 unsigned int hblank, total_pixels, pixel_freq; 397 int hsync, hfront_porch, vodd_front_porch_lines; 398 unsigned int tmp1, tmp2; 399 400 drm_mode = drm_mode_create(dev); 401 if (!drm_mode) 402 return NULL; 403 404 /* 1. In order to give correct results, the number of horizontal 405 * pixels requested is first processed to ensure that it is divisible 406 * by the character size, by rounding it to the nearest character 407 * cell boundary: 408 */ 409 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 410 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 411 412 /* 2. If interlace is requested, the number of vertical lines assumed 413 * by the calculation must be halved, as the computation calculates 414 * the number of vertical lines per field. 415 */ 416 if (interlaced) 417 vdisplay_rnd = vdisplay / 2; 418 else 419 vdisplay_rnd = vdisplay; 420 421 /* 3. Find the frame rate required: */ 422 if (interlaced) 423 vfieldrate_rqd = vrefresh * 2; 424 else 425 vfieldrate_rqd = vrefresh; 426 427 /* 4. Find number of lines in Top margin: */ 428 top_margin = 0; 429 if (margins) 430 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 431 1000; 432 /* 5. Find number of lines in bottom margin: */ 433 bottom_margin = top_margin; 434 435 /* 6. If interlace is required, then set variable interlace: */ 436 if (interlaced) 437 interlace = 1; 438 else 439 interlace = 0; 440 441 /* 7. Estimate the Horizontal frequency */ 442 { 443 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 444 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 445 2 + interlace; 446 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 447 } 448 449 /* 8. Find the number of lines in V sync + back porch */ 450 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 451 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 452 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 453 /* 9. Find the number of lines in V back porch alone: */ 454 vback_porch = vsync_plus_bp - V_SYNC_RQD; 455 /* 10. Find the total number of lines in Vertical field period: */ 456 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 457 vsync_plus_bp + GTF_MIN_V_PORCH; 458 /* 11. Estimate the Vertical field frequency: */ 459 vfieldrate_est = hfreq_est / vtotal_lines; 460 /* 12. Find the actual horizontal period: */ 461 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 462 463 /* 13. Find the actual Vertical field frequency: */ 464 vfield_rate = hfreq_est / vtotal_lines; 465 /* 14. Find the Vertical frame frequency: */ 466 if (interlaced) 467 vframe_rate = vfield_rate / 2; 468 else 469 vframe_rate = vfield_rate; 470 /* 15. Find number of pixels in left margin: */ 471 if (margins) 472 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 473 1000; 474 else 475 left_margin = 0; 476 477 /* 16.Find number of pixels in right margin: */ 478 right_margin = left_margin; 479 /* 17.Find total number of active pixels in image and left and right */ 480 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 481 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 482 ideal_duty_cycle = GTF_C_PRIME * 1000 - 483 (GTF_M_PRIME * 1000000 / hfreq_est); 484 /* 19.Find the number of pixels in the blanking time to the nearest 485 * double character cell: */ 486 hblank = total_active_pixels * ideal_duty_cycle / 487 (100000 - ideal_duty_cycle); 488 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 489 hblank = hblank * 2 * GTF_CELL_GRAN; 490 /* 20.Find total number of pixels: */ 491 total_pixels = total_active_pixels + hblank; 492 /* 21.Find pixel clock frequency: */ 493 pixel_freq = total_pixels * hfreq_est / 1000; 494 /* Stage 1 computations are now complete; I should really pass 495 * the results to another function and do the Stage 2 computations, 496 * but I only need a few more values so I'll just append the 497 * computations here for now */ 498 /* 17. Find the number of pixels in the horizontal sync period: */ 499 hsync = H_SYNC_PERCENT * total_pixels / 100; 500 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 501 hsync = hsync * GTF_CELL_GRAN; 502 /* 18. Find the number of pixels in horizontal front porch period */ 503 hfront_porch = hblank / 2 - hsync; 504 /* 36. Find the number of lines in the odd front porch period: */ 505 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 506 507 /* finally, pack the results in the mode struct */ 508 drm_mode->hdisplay = hdisplay_rnd; 509 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 510 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 511 drm_mode->htotal = total_pixels; 512 drm_mode->vdisplay = vdisplay_rnd; 513 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 514 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 515 drm_mode->vtotal = vtotal_lines; 516 517 drm_mode->clock = pixel_freq; 518 519 if (interlaced) { 520 drm_mode->vtotal *= 2; 521 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 522 } 523 524 drm_mode_set_name(drm_mode); 525 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 526 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 527 else 528 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 529 530 return drm_mode; 531 } 532 EXPORT_SYMBOL(drm_gtf_mode_complex); 533 534 /** 535 * drm_gtf_mode - create the modeline based on the GTF algorithm 536 * @dev: drm device 537 * @hdisplay: hdisplay size 538 * @vdisplay: vdisplay size 539 * @vrefresh: vrefresh rate. 540 * @interlaced: whether to compute an interlaced mode 541 * @margins: desired margin (borders) size 542 * 543 * return the modeline based on GTF algorithm 544 * 545 * This function is to create the modeline based on the GTF algorithm. 546 * Generalized Timing Formula is derived from: 547 * 548 * GTF Spreadsheet by Andy Morrish (1/5/97) 549 * available at http://www.vesa.org 550 * 551 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 552 * What I have done is to translate it by using integer calculation. 553 * I also refer to the function of fb_get_mode in the file of 554 * drivers/video/fbmon.c 555 * 556 * Standard GTF parameters:: 557 * 558 * M = 600 559 * C = 40 560 * K = 128 561 * J = 20 562 * 563 * Returns: 564 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 565 * The display mode object is allocated with drm_mode_create(). Returns NULL 566 * when no mode could be allocated. 567 */ 568 struct drm_display_mode * 569 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 570 bool interlaced, int margins) 571 { 572 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 573 interlaced, margins, 574 600, 40 * 2, 128, 20 * 2); 575 } 576 EXPORT_SYMBOL(drm_gtf_mode); 577 578 #ifdef CONFIG_VIDEOMODE_HELPERS 579 /** 580 * drm_display_mode_from_videomode - fill in @dmode using @vm, 581 * @vm: videomode structure to use as source 582 * @dmode: drm_display_mode structure to use as destination 583 * 584 * Fills out @dmode using the display mode specified in @vm. 585 */ 586 void drm_display_mode_from_videomode(const struct videomode *vm, 587 struct drm_display_mode *dmode) 588 { 589 dmode->hdisplay = vm->hactive; 590 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 591 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 592 dmode->htotal = dmode->hsync_end + vm->hback_porch; 593 594 dmode->vdisplay = vm->vactive; 595 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 596 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 597 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 598 599 dmode->clock = vm->pixelclock / 1000; 600 601 dmode->flags = 0; 602 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 603 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 604 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 605 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 606 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 607 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 608 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 609 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 610 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 611 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 612 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 613 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 614 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 615 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 616 drm_mode_set_name(dmode); 617 } 618 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 619 620 /** 621 * drm_display_mode_to_videomode - fill in @vm using @dmode, 622 * @dmode: drm_display_mode structure to use as source 623 * @vm: videomode structure to use as destination 624 * 625 * Fills out @vm using the display mode specified in @dmode. 626 */ 627 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 628 struct videomode *vm) 629 { 630 vm->hactive = dmode->hdisplay; 631 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 632 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 633 vm->hback_porch = dmode->htotal - dmode->hsync_end; 634 635 vm->vactive = dmode->vdisplay; 636 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 637 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 638 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 639 640 vm->pixelclock = dmode->clock * 1000; 641 642 vm->flags = 0; 643 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 644 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 645 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 646 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 647 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 648 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 649 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 650 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 651 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 652 vm->flags |= DISPLAY_FLAGS_INTERLACED; 653 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 654 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 655 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 656 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 657 } 658 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 659 660 /** 661 * drm_bus_flags_from_videomode - extract information about pixelclk and 662 * DE polarity from videomode and store it in a separate variable 663 * @vm: videomode structure to use 664 * @bus_flags: information about pixelclk and DE polarity will be stored here 665 * 666 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE 667 * in @bus_flags according to DISPLAY_FLAGS found in @vm 668 */ 669 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 670 { 671 *bus_flags = 0; 672 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 673 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE; 674 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 675 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE; 676 677 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 678 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 679 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 680 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 681 } 682 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 683 684 #ifdef CONFIG_OF 685 /** 686 * of_get_drm_display_mode - get a drm_display_mode from devicetree 687 * @np: device_node with the timing specification 688 * @dmode: will be set to the return value 689 * @bus_flags: information about pixelclk and DE polarity 690 * @index: index into the list of display timings in devicetree 691 * 692 * This function is expensive and should only be used, if only one mode is to be 693 * read from DT. To get multiple modes start with of_get_display_timings and 694 * work with that instead. 695 * 696 * Returns: 697 * 0 on success, a negative errno code when no of videomode node was found. 698 */ 699 int of_get_drm_display_mode(struct device_node *np, 700 struct drm_display_mode *dmode, u32 *bus_flags, 701 int index) 702 { 703 struct videomode vm; 704 int ret; 705 706 ret = of_get_videomode(np, &vm, index); 707 if (ret) 708 return ret; 709 710 drm_display_mode_from_videomode(&vm, dmode); 711 if (bus_flags) 712 drm_bus_flags_from_videomode(&vm, bus_flags); 713 714 pr_debug("%s: got %dx%d display mode from %s\n", 715 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 716 drm_mode_debug_printmodeline(dmode); 717 718 return 0; 719 } 720 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 721 #endif /* CONFIG_OF */ 722 #endif /* CONFIG_VIDEOMODE_HELPERS */ 723 724 /** 725 * drm_mode_set_name - set the name on a mode 726 * @mode: name will be set in this mode 727 * 728 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 729 * with an optional 'i' suffix for interlaced modes. 730 */ 731 void drm_mode_set_name(struct drm_display_mode *mode) 732 { 733 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 734 735 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 736 mode->hdisplay, mode->vdisplay, 737 interlaced ? "i" : ""); 738 } 739 EXPORT_SYMBOL(drm_mode_set_name); 740 741 /** 742 * drm_mode_hsync - get the hsync of a mode 743 * @mode: mode 744 * 745 * Returns: 746 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 747 * value first if it is not yet set. 748 */ 749 int drm_mode_hsync(const struct drm_display_mode *mode) 750 { 751 unsigned int calc_val; 752 753 if (mode->hsync) 754 return mode->hsync; 755 756 if (mode->htotal < 0) 757 return 0; 758 759 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 760 calc_val += 500; /* round to 1000Hz */ 761 calc_val /= 1000; /* truncate to kHz */ 762 763 return calc_val; 764 } 765 EXPORT_SYMBOL(drm_mode_hsync); 766 767 /** 768 * drm_mode_vrefresh - get the vrefresh of a mode 769 * @mode: mode 770 * 771 * Returns: 772 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 773 * value first if it is not yet set. 774 */ 775 int drm_mode_vrefresh(const struct drm_display_mode *mode) 776 { 777 int refresh = 0; 778 unsigned int calc_val; 779 780 if (mode->vrefresh > 0) 781 refresh = mode->vrefresh; 782 else if (mode->htotal > 0 && mode->vtotal > 0) { 783 int vtotal; 784 vtotal = mode->vtotal; 785 /* work out vrefresh the value will be x1000 */ 786 calc_val = (mode->clock * 1000); 787 calc_val /= mode->htotal; 788 refresh = (calc_val + vtotal / 2) / vtotal; 789 790 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 791 refresh *= 2; 792 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 793 refresh /= 2; 794 if (mode->vscan > 1) 795 refresh /= mode->vscan; 796 } 797 return refresh; 798 } 799 EXPORT_SYMBOL(drm_mode_vrefresh); 800 801 /** 802 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 803 * @p: mode 804 * @adjust_flags: a combination of adjustment flags 805 * 806 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 807 * 808 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 809 * interlaced modes. 810 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 811 * buffers containing two eyes (only adjust the timings when needed, eg. for 812 * "frame packing" or "side by side full"). 813 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 814 * be performed for doublescan and vscan > 1 modes respectively. 815 */ 816 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 817 { 818 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 819 return; 820 821 p->crtc_clock = p->clock; 822 p->crtc_hdisplay = p->hdisplay; 823 p->crtc_hsync_start = p->hsync_start; 824 p->crtc_hsync_end = p->hsync_end; 825 p->crtc_htotal = p->htotal; 826 p->crtc_hskew = p->hskew; 827 p->crtc_vdisplay = p->vdisplay; 828 p->crtc_vsync_start = p->vsync_start; 829 p->crtc_vsync_end = p->vsync_end; 830 p->crtc_vtotal = p->vtotal; 831 832 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 833 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 834 p->crtc_vdisplay /= 2; 835 p->crtc_vsync_start /= 2; 836 p->crtc_vsync_end /= 2; 837 p->crtc_vtotal /= 2; 838 } 839 } 840 841 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 842 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 843 p->crtc_vdisplay *= 2; 844 p->crtc_vsync_start *= 2; 845 p->crtc_vsync_end *= 2; 846 p->crtc_vtotal *= 2; 847 } 848 } 849 850 if (!(adjust_flags & CRTC_NO_VSCAN)) { 851 if (p->vscan > 1) { 852 p->crtc_vdisplay *= p->vscan; 853 p->crtc_vsync_start *= p->vscan; 854 p->crtc_vsync_end *= p->vscan; 855 p->crtc_vtotal *= p->vscan; 856 } 857 } 858 859 if (adjust_flags & CRTC_STEREO_DOUBLE) { 860 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 861 862 switch (layout) { 863 case DRM_MODE_FLAG_3D_FRAME_PACKING: 864 p->crtc_clock *= 2; 865 p->crtc_vdisplay += p->crtc_vtotal; 866 p->crtc_vsync_start += p->crtc_vtotal; 867 p->crtc_vsync_end += p->crtc_vtotal; 868 p->crtc_vtotal += p->crtc_vtotal; 869 break; 870 } 871 } 872 873 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 874 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 875 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 876 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 877 } 878 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 879 880 /** 881 * drm_mode_copy - copy the mode 882 * @dst: mode to overwrite 883 * @src: mode to copy 884 * 885 * Copy an existing mode into another mode, preserving the object id and 886 * list head of the destination mode. 887 */ 888 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 889 { 890 int id = dst->base.id; 891 struct list_head head = dst->head; 892 893 *dst = *src; 894 dst->base.id = id; 895 dst->head = head; 896 } 897 EXPORT_SYMBOL(drm_mode_copy); 898 899 /** 900 * drm_mode_duplicate - allocate and duplicate an existing mode 901 * @dev: drm_device to allocate the duplicated mode for 902 * @mode: mode to duplicate 903 * 904 * Just allocate a new mode, copy the existing mode into it, and return 905 * a pointer to it. Used to create new instances of established modes. 906 * 907 * Returns: 908 * Pointer to duplicated mode on success, NULL on error. 909 */ 910 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 911 const struct drm_display_mode *mode) 912 { 913 struct drm_display_mode *nmode; 914 915 nmode = drm_mode_create(dev); 916 if (!nmode) 917 return NULL; 918 919 drm_mode_copy(nmode, mode); 920 921 return nmode; 922 } 923 EXPORT_SYMBOL(drm_mode_duplicate); 924 925 /** 926 * drm_mode_equal - test modes for equality 927 * @mode1: first mode 928 * @mode2: second mode 929 * 930 * Check to see if @mode1 and @mode2 are equivalent. 931 * 932 * Returns: 933 * True if the modes are equal, false otherwise. 934 */ 935 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 936 { 937 if (!mode1 && !mode2) 938 return true; 939 940 if (!mode1 || !mode2) 941 return false; 942 943 /* do clock check convert to PICOS so fb modes get matched 944 * the same */ 945 if (mode1->clock && mode2->clock) { 946 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 947 return false; 948 } else if (mode1->clock != mode2->clock) 949 return false; 950 951 return drm_mode_equal_no_clocks(mode1, mode2); 952 } 953 EXPORT_SYMBOL(drm_mode_equal); 954 955 /** 956 * drm_mode_equal_no_clocks - test modes for equality 957 * @mode1: first mode 958 * @mode2: second mode 959 * 960 * Check to see if @mode1 and @mode2 are equivalent, but 961 * don't check the pixel clocks. 962 * 963 * Returns: 964 * True if the modes are equal, false otherwise. 965 */ 966 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 967 { 968 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 969 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 970 return false; 971 972 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 973 } 974 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 975 976 /** 977 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 978 * @mode1: first mode 979 * @mode2: second mode 980 * 981 * Check to see if @mode1 and @mode2 are equivalent, but 982 * don't check the pixel clocks nor the stereo layout. 983 * 984 * Returns: 985 * True if the modes are equal, false otherwise. 986 */ 987 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 988 const struct drm_display_mode *mode2) 989 { 990 if (mode1->hdisplay == mode2->hdisplay && 991 mode1->hsync_start == mode2->hsync_start && 992 mode1->hsync_end == mode2->hsync_end && 993 mode1->htotal == mode2->htotal && 994 mode1->hskew == mode2->hskew && 995 mode1->vdisplay == mode2->vdisplay && 996 mode1->vsync_start == mode2->vsync_start && 997 mode1->vsync_end == mode2->vsync_end && 998 mode1->vtotal == mode2->vtotal && 999 mode1->vscan == mode2->vscan && 1000 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1001 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 1002 return true; 1003 1004 return false; 1005 } 1006 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1007 1008 /** 1009 * drm_mode_validate_basic - make sure the mode is somewhat sane 1010 * @mode: mode to check 1011 * 1012 * Check that the mode timings are at least somewhat reasonable. 1013 * Any hardware specific limits are left up for each driver to check. 1014 * 1015 * Returns: 1016 * The mode status 1017 */ 1018 enum drm_mode_status 1019 drm_mode_validate_basic(const struct drm_display_mode *mode) 1020 { 1021 if (mode->clock == 0) 1022 return MODE_CLOCK_LOW; 1023 1024 if (mode->hdisplay == 0 || 1025 mode->hsync_start < mode->hdisplay || 1026 mode->hsync_end < mode->hsync_start || 1027 mode->htotal < mode->hsync_end) 1028 return MODE_H_ILLEGAL; 1029 1030 if (mode->vdisplay == 0 || 1031 mode->vsync_start < mode->vdisplay || 1032 mode->vsync_end < mode->vsync_start || 1033 mode->vtotal < mode->vsync_end) 1034 return MODE_V_ILLEGAL; 1035 1036 return MODE_OK; 1037 } 1038 EXPORT_SYMBOL(drm_mode_validate_basic); 1039 1040 /** 1041 * drm_mode_validate_size - make sure modes adhere to size constraints 1042 * @mode: mode to check 1043 * @maxX: maximum width 1044 * @maxY: maximum height 1045 * 1046 * This function is a helper which can be used to validate modes against size 1047 * limitations of the DRM device/connector. If a mode is too big its status 1048 * member is updated with the appropriate validation failure code. The list 1049 * itself is not changed. 1050 * 1051 * Returns: 1052 * The mode status 1053 */ 1054 enum drm_mode_status 1055 drm_mode_validate_size(const struct drm_display_mode *mode, 1056 int maxX, int maxY) 1057 { 1058 if (maxX > 0 && mode->hdisplay > maxX) 1059 return MODE_VIRTUAL_X; 1060 1061 if (maxY > 0 && mode->vdisplay > maxY) 1062 return MODE_VIRTUAL_Y; 1063 1064 return MODE_OK; 1065 } 1066 EXPORT_SYMBOL(drm_mode_validate_size); 1067 1068 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1069 1070 static const char * const drm_mode_status_names[] = { 1071 MODE_STATUS(OK), 1072 MODE_STATUS(HSYNC), 1073 MODE_STATUS(VSYNC), 1074 MODE_STATUS(H_ILLEGAL), 1075 MODE_STATUS(V_ILLEGAL), 1076 MODE_STATUS(BAD_WIDTH), 1077 MODE_STATUS(NOMODE), 1078 MODE_STATUS(NO_INTERLACE), 1079 MODE_STATUS(NO_DBLESCAN), 1080 MODE_STATUS(NO_VSCAN), 1081 MODE_STATUS(MEM), 1082 MODE_STATUS(VIRTUAL_X), 1083 MODE_STATUS(VIRTUAL_Y), 1084 MODE_STATUS(MEM_VIRT), 1085 MODE_STATUS(NOCLOCK), 1086 MODE_STATUS(CLOCK_HIGH), 1087 MODE_STATUS(CLOCK_LOW), 1088 MODE_STATUS(CLOCK_RANGE), 1089 MODE_STATUS(BAD_HVALUE), 1090 MODE_STATUS(BAD_VVALUE), 1091 MODE_STATUS(BAD_VSCAN), 1092 MODE_STATUS(HSYNC_NARROW), 1093 MODE_STATUS(HSYNC_WIDE), 1094 MODE_STATUS(HBLANK_NARROW), 1095 MODE_STATUS(HBLANK_WIDE), 1096 MODE_STATUS(VSYNC_NARROW), 1097 MODE_STATUS(VSYNC_WIDE), 1098 MODE_STATUS(VBLANK_NARROW), 1099 MODE_STATUS(VBLANK_WIDE), 1100 MODE_STATUS(PANEL), 1101 MODE_STATUS(INTERLACE_WIDTH), 1102 MODE_STATUS(ONE_WIDTH), 1103 MODE_STATUS(ONE_HEIGHT), 1104 MODE_STATUS(ONE_SIZE), 1105 MODE_STATUS(NO_REDUCED), 1106 MODE_STATUS(NO_STEREO), 1107 MODE_STATUS(STALE), 1108 MODE_STATUS(BAD), 1109 MODE_STATUS(ERROR), 1110 }; 1111 1112 #undef MODE_STATUS 1113 1114 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1115 { 1116 int index = status + 3; 1117 1118 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1119 return ""; 1120 1121 return drm_mode_status_names[index]; 1122 } 1123 1124 /** 1125 * drm_mode_prune_invalid - remove invalid modes from mode list 1126 * @dev: DRM device 1127 * @mode_list: list of modes to check 1128 * @verbose: be verbose about it 1129 * 1130 * This helper function can be used to prune a display mode list after 1131 * validation has been completed. All modes who's status is not MODE_OK will be 1132 * removed from the list, and if @verbose the status code and mode name is also 1133 * printed to dmesg. 1134 */ 1135 void drm_mode_prune_invalid(struct drm_device *dev, 1136 struct list_head *mode_list, bool verbose) 1137 { 1138 struct drm_display_mode *mode, *t; 1139 1140 list_for_each_entry_safe(mode, t, mode_list, head) { 1141 if (mode->status != MODE_OK) { 1142 list_del(&mode->head); 1143 if (verbose) { 1144 drm_mode_debug_printmodeline(mode); 1145 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1146 mode->name, 1147 drm_get_mode_status_name(mode->status)); 1148 } 1149 drm_mode_destroy(dev, mode); 1150 } 1151 } 1152 } 1153 EXPORT_SYMBOL(drm_mode_prune_invalid); 1154 1155 /** 1156 * drm_mode_compare - compare modes for favorability 1157 * @priv: unused 1158 * @lh_a: list_head for first mode 1159 * @lh_b: list_head for second mode 1160 * 1161 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1162 * which is better. 1163 * 1164 * Returns: 1165 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1166 * positive if @lh_b is better than @lh_a. 1167 */ 1168 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1169 { 1170 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1171 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1172 int diff; 1173 1174 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1175 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1176 if (diff) 1177 return diff; 1178 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1179 if (diff) 1180 return diff; 1181 1182 diff = b->vrefresh - a->vrefresh; 1183 if (diff) 1184 return diff; 1185 1186 diff = b->clock - a->clock; 1187 return diff; 1188 } 1189 1190 /** 1191 * drm_mode_sort - sort mode list 1192 * @mode_list: list of drm_display_mode structures to sort 1193 * 1194 * Sort @mode_list by favorability, moving good modes to the head of the list. 1195 */ 1196 void drm_mode_sort(struct list_head *mode_list) 1197 { 1198 list_sort(NULL, mode_list, drm_mode_compare); 1199 } 1200 EXPORT_SYMBOL(drm_mode_sort); 1201 1202 /** 1203 * drm_mode_connector_list_update - update the mode list for the connector 1204 * @connector: the connector to update 1205 * 1206 * This moves the modes from the @connector probed_modes list 1207 * to the actual mode list. It compares the probed mode against the current 1208 * list and only adds different/new modes. 1209 * 1210 * This is just a helper functions doesn't validate any modes itself and also 1211 * doesn't prune any invalid modes. Callers need to do that themselves. 1212 */ 1213 void drm_mode_connector_list_update(struct drm_connector *connector) 1214 { 1215 struct drm_display_mode *pmode, *pt; 1216 1217 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1218 1219 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1220 struct drm_display_mode *mode; 1221 bool found_it = false; 1222 1223 /* go through current modes checking for the new probed mode */ 1224 list_for_each_entry(mode, &connector->modes, head) { 1225 if (!drm_mode_equal(pmode, mode)) 1226 continue; 1227 1228 found_it = true; 1229 1230 /* 1231 * If the old matching mode is stale (ie. left over 1232 * from a previous probe) just replace it outright. 1233 * Otherwise just merge the type bits between all 1234 * equal probed modes. 1235 * 1236 * If two probed modes are considered equal, pick the 1237 * actual timings from the one that's marked as 1238 * preferred (in case the match isn't 100%). If 1239 * multiple or zero preferred modes are present, favor 1240 * the mode added to the probed_modes list first. 1241 */ 1242 if (mode->status == MODE_STALE) { 1243 drm_mode_copy(mode, pmode); 1244 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1245 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1246 pmode->type |= mode->type; 1247 drm_mode_copy(mode, pmode); 1248 } else { 1249 mode->type |= pmode->type; 1250 } 1251 1252 list_del(&pmode->head); 1253 drm_mode_destroy(connector->dev, pmode); 1254 break; 1255 } 1256 1257 if (!found_it) { 1258 list_move_tail(&pmode->head, &connector->modes); 1259 } 1260 } 1261 } 1262 EXPORT_SYMBOL(drm_mode_connector_list_update); 1263 1264 /** 1265 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1266 * @mode_option: optional per connector mode option 1267 * @connector: connector to parse modeline for 1268 * @mode: preallocated drm_cmdline_mode structure to fill out 1269 * 1270 * This parses @mode_option command line modeline for modes and options to 1271 * configure the connector. If @mode_option is NULL the default command line 1272 * modeline in fb_mode_option will be parsed instead. 1273 * 1274 * This uses the same parameters as the fb modedb.c, except for an extra 1275 * force-enable, force-enable-digital and force-disable bit at the end: 1276 * 1277 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1278 * 1279 * The intermediate drm_cmdline_mode structure is required to store additional 1280 * options from the command line modline like the force-enable/disable flag. 1281 * 1282 * Returns: 1283 * True if a valid modeline has been parsed, false otherwise. 1284 */ 1285 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1286 struct drm_connector *connector, 1287 struct drm_cmdline_mode *mode) 1288 { 1289 const char *name; 1290 unsigned int namelen; 1291 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1292 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1293 bool yres_specified = false, cvt = false, rb = false; 1294 bool interlace = false, margins = false, was_digit = false; 1295 int i; 1296 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1297 1298 #ifdef CONFIG_FB 1299 if (!mode_option) 1300 mode_option = fb_mode_option; 1301 #endif 1302 1303 if (!mode_option) { 1304 mode->specified = false; 1305 return false; 1306 } 1307 1308 name = mode_option; 1309 namelen = strlen(name); 1310 for (i = namelen-1; i >= 0; i--) { 1311 switch (name[i]) { 1312 case '@': 1313 if (!refresh_specified && !bpp_specified && 1314 !yres_specified && !cvt && !rb && was_digit) { 1315 refresh = simple_strtol(&name[i+1], NULL, 10); 1316 refresh_specified = true; 1317 was_digit = false; 1318 } else 1319 goto done; 1320 break; 1321 case '-': 1322 if (!bpp_specified && !yres_specified && !cvt && 1323 !rb && was_digit) { 1324 bpp = simple_strtol(&name[i+1], NULL, 10); 1325 bpp_specified = true; 1326 was_digit = false; 1327 } else 1328 goto done; 1329 break; 1330 case 'x': 1331 if (!yres_specified && was_digit) { 1332 yres = simple_strtol(&name[i+1], NULL, 10); 1333 yres_specified = true; 1334 was_digit = false; 1335 } else 1336 goto done; 1337 break; 1338 case '0' ... '9': 1339 was_digit = true; 1340 break; 1341 case 'M': 1342 if (yres_specified || cvt || was_digit) 1343 goto done; 1344 cvt = true; 1345 break; 1346 case 'R': 1347 if (yres_specified || cvt || rb || was_digit) 1348 goto done; 1349 rb = true; 1350 break; 1351 case 'm': 1352 if (cvt || yres_specified || was_digit) 1353 goto done; 1354 margins = true; 1355 break; 1356 case 'i': 1357 if (cvt || yres_specified || was_digit) 1358 goto done; 1359 interlace = true; 1360 break; 1361 case 'e': 1362 if (yres_specified || bpp_specified || refresh_specified || 1363 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1364 goto done; 1365 1366 force = DRM_FORCE_ON; 1367 break; 1368 case 'D': 1369 if (yres_specified || bpp_specified || refresh_specified || 1370 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1371 goto done; 1372 1373 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1374 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1375 force = DRM_FORCE_ON; 1376 else 1377 force = DRM_FORCE_ON_DIGITAL; 1378 break; 1379 case 'd': 1380 if (yres_specified || bpp_specified || refresh_specified || 1381 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1382 goto done; 1383 1384 force = DRM_FORCE_OFF; 1385 break; 1386 default: 1387 goto done; 1388 } 1389 } 1390 1391 if (i < 0 && yres_specified) { 1392 char *ch; 1393 xres = simple_strtol(name, &ch, 10); 1394 if ((ch != NULL) && (*ch == 'x')) 1395 res_specified = true; 1396 else 1397 i = ch - name; 1398 } else if (!yres_specified && was_digit) { 1399 /* catch mode that begins with digits but has no 'x' */ 1400 i = 0; 1401 } 1402 done: 1403 if (i >= 0) { 1404 pr_warn("[drm] parse error at position %i in video mode '%s'\n", 1405 i, name); 1406 mode->specified = false; 1407 return false; 1408 } 1409 1410 if (res_specified) { 1411 mode->specified = true; 1412 mode->xres = xres; 1413 mode->yres = yres; 1414 } 1415 1416 if (refresh_specified) { 1417 mode->refresh_specified = true; 1418 mode->refresh = refresh; 1419 } 1420 1421 if (bpp_specified) { 1422 mode->bpp_specified = true; 1423 mode->bpp = bpp; 1424 } 1425 mode->rb = rb; 1426 mode->cvt = cvt; 1427 mode->interlace = interlace; 1428 mode->margins = margins; 1429 mode->force = force; 1430 1431 return true; 1432 } 1433 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1434 1435 /** 1436 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1437 * @dev: DRM device to create the new mode for 1438 * @cmd: input command line modeline 1439 * 1440 * Returns: 1441 * Pointer to converted mode on success, NULL on error. 1442 */ 1443 struct drm_display_mode * 1444 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1445 struct drm_cmdline_mode *cmd) 1446 { 1447 struct drm_display_mode *mode; 1448 1449 if (cmd->cvt) 1450 mode = drm_cvt_mode(dev, 1451 cmd->xres, cmd->yres, 1452 cmd->refresh_specified ? cmd->refresh : 60, 1453 cmd->rb, cmd->interlace, 1454 cmd->margins); 1455 else 1456 mode = drm_gtf_mode(dev, 1457 cmd->xres, cmd->yres, 1458 cmd->refresh_specified ? cmd->refresh : 60, 1459 cmd->interlace, 1460 cmd->margins); 1461 if (!mode) 1462 return NULL; 1463 1464 mode->type |= DRM_MODE_TYPE_USERDEF; 1465 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1466 return mode; 1467 } 1468 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1469 1470 /** 1471 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1472 * @out: drm_mode_modeinfo struct to return to the user 1473 * @in: drm_display_mode to use 1474 * 1475 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1476 * the user. 1477 */ 1478 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1479 const struct drm_display_mode *in) 1480 { 1481 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1482 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1483 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1484 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1485 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1486 "timing values too large for mode info\n"); 1487 1488 out->clock = in->clock; 1489 out->hdisplay = in->hdisplay; 1490 out->hsync_start = in->hsync_start; 1491 out->hsync_end = in->hsync_end; 1492 out->htotal = in->htotal; 1493 out->hskew = in->hskew; 1494 out->vdisplay = in->vdisplay; 1495 out->vsync_start = in->vsync_start; 1496 out->vsync_end = in->vsync_end; 1497 out->vtotal = in->vtotal; 1498 out->vscan = in->vscan; 1499 out->vrefresh = in->vrefresh; 1500 out->flags = in->flags; 1501 out->type = in->type; 1502 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1503 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1504 } 1505 1506 /** 1507 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1508 * @out: drm_display_mode to return to the user 1509 * @in: drm_mode_modeinfo to use 1510 * 1511 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1512 * the caller. 1513 * 1514 * Returns: 1515 * Zero on success, negative errno on failure. 1516 */ 1517 int drm_mode_convert_umode(struct drm_display_mode *out, 1518 const struct drm_mode_modeinfo *in) 1519 { 1520 int ret = -EINVAL; 1521 1522 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1523 ret = -ERANGE; 1524 goto out; 1525 } 1526 1527 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1528 goto out; 1529 1530 out->clock = in->clock; 1531 out->hdisplay = in->hdisplay; 1532 out->hsync_start = in->hsync_start; 1533 out->hsync_end = in->hsync_end; 1534 out->htotal = in->htotal; 1535 out->hskew = in->hskew; 1536 out->vdisplay = in->vdisplay; 1537 out->vsync_start = in->vsync_start; 1538 out->vsync_end = in->vsync_end; 1539 out->vtotal = in->vtotal; 1540 out->vscan = in->vscan; 1541 out->vrefresh = in->vrefresh; 1542 out->flags = in->flags; 1543 out->type = in->type; 1544 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1545 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1546 1547 out->status = drm_mode_validate_basic(out); 1548 if (out->status != MODE_OK) 1549 goto out; 1550 1551 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1552 1553 ret = 0; 1554 1555 out: 1556 return ret; 1557 } 1558